Traction device for vehicle-wheels.



T. H. KELLY.

TRAGTION DEVICE POR VEHICLE WHEELS.

APPLICATION FILED APR.4,1913.

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ovvi/Miaou o z T. H. KELLY.

TRAGTION DEVICE POR VBHIGLE WHEELS.

APPLICATION FILED APRA, 1913.

1,102,214. Patented JuliT 7, 1914n wwwa/miao 5 woe vwo/c THOMAS HQ KELLY, or New yoRK, N. Y.

TRACTION DEVICE FOR 'VEHICLE-WHEELS.

Specification of Letters Patent.

Patented July v, 1914..

Application filed April 4, 1913. Serial No. 758,753.

'o all 'whom t 71mg/ concern.

Be it known that l, THOMAS H. KELLY, a citizen of the United States, residing in the borough of Manhattan, city, county, and State of New York, have invented certain 'new and useful Improvements in Traction Devices for Vehicle-Wheels, of which the following is a specification.

My invention relates to improvements in traction devices for vehicle wheels, particularly those having rubber tires, and aims to provide a structure `detachably mountable upon a vehiele'wheel and adjustable with respect to the ground, so thatit may be brougl'it into operative position when needed and withdrawn when road conditions` make its use unnecessary.

vln the accompanying 'drawings which Jform a part of this specification, Figure 1 is a front elevation of a vehicle wheel pro vided with a rubber tire and equipped with my traction device; 'Fig'. Q` is a transverse sectional view on line II-ll of Fig. 1; Fig. 3 is an enlarged fragmentary sectional view on line lll-llI of Fig. 1; Fig. 4 is an enlarged fragmentary sectional view on line lll-IV of Fig. 11 Fig. 5 is an enlarged fragmentary sectional view on line VNV of Fig. 1; lFig. G is a front elevation of a vehicle wheel provided with a tire and equipped i with a n'lodified form of my device. the parts being shown retracted out ot' operative position; Fig. T is a fragmentary t'ront elevation of a vehicle wheel provided with a further modification of the traction device.

Referring to the drawinJs` in detail and particularly to Figs. 'l to 5, inclusive, the numeral l designatesa vehicle wheel provided with a telly 2 upon which is mounted a tire-carrying rim 3 supporting the pnen matic tire i. although in v device is adapted for use with any type of tire. A. plurality i of brackets 5 are attached to the wheel by having their threaded ends G pass radially through the felly and engage conical nuts 7 mounted in sockets formed in the felly and the base of the til-@carrying rim. Four of these brackets have formed upon their outer extremitiesl box members 8 whose major axes are substantially parallel to the major plane of the wheel, but inclined to a radius for a f purpose which will. later be described. Each of these boxes receives one arm of an angle bracket D upon which ls mounted a full elliptic spring 10. The flattened end of each bracket 9 which is received within the box member 8 is prt vided with a plurality of holes 11 therethrough adapted to receive a bolt 12 provided with the head 13 and wing nut 14, s0 that the bracket 9 may be clamped in any one of a 'number of positions with respect to its particular box member.

Two of the bracket members 5, Which are diametrically opposite each other, carry upon their outer extremities box members 15 adapted to receive T-brackets 16, each of which carries a full elliptic Spring 10. The shafts of the brackets 16 are provided with teeth 17 engaging the pinions 18. Passing transversely through each of the brackets 16 are a plurali of holes for the reception of a bolt l!) passing through the box member 15 and provided with a wing nut 2O for clamping the bracket in fixed position with respect to the member 15. Two segmental, ap roximately semi-circular resilient straps or ands Q1 and Q2 are mounted upon the elliptic as clearly shown in Fig. 1. These '.1 are provided about their outer periphery willi wedge-shaped blocks 23 oi wood. fiber or metal for engagement with the road surface, thereby increasing the tractive ell'ort expended by the wheel in passinff over a slippery surface. The strap or ban '2l is provided with t\vo oll'set straps or eX-V tensions 24 and 25 and the band Q2 is provided with Iwo sinlilarly oll'se Straps Q6 and 2T. These respective straps overlap, as shown in Fig. l. and means for clamping them together are provided by the box members 2S and 29, each ol' which has a bolt 30, wingr um` 3l and fillingr piece for clamping the vel-lapping end ol.' the strap mem.- bers in tixed position. Each of the lstraps is in. provided with a plurality of holes transversely tlu-retlirough for the reception ol its respective bolt.

ln operating the device the wing nuts 1l, i2() and 3l are first loosened and the bolts 13, 1S) and El() removed.l B v applying a wrench to the nuts on the end-` ol the shafts of the gears 1S, these gears may be rotated. thus` causing the brackets lo to slide in the 

